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XGN SCHEDULE 13G/A: SEC filing

Filed with the SEC on · accession 0001140361-26-043757

XGN filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 13, 2026. NMSIC Co-Investment Fund, L.P. and its general partner Sun Mountain Capital Partners, L.L.C. filed an amended Schedule 13G reporting beneficial ownership of 863,958 shares, or 3.39%, of Exagen Inc. common stock. The stock moved -6.3% by the first close after the filing.

Summary of the filing

NMSIC Co-Investment Fund, L.P. and its general partner Sun Mountain Capital Partners, L.L.C. filed an amended Schedule 13G reporting beneficial ownership of 863,958 shares, or 3.39%, of Exagen Inc. common stock. The filing is a passive ownership disclosure with no reported change in holdings.

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Key details

Shares beneficially owned$864K
Percentage of outstanding shares owned$3
Total shares outstanding$25.5M
Reporting person / beneficial ownerNMSIC Co-Investment Fund, L.P.
General partner of nmsicSun Mountain Capital Partners, L.L.C.
IssuerExagen Inc.
Managing member of sun mountain capital partners, l.l.c.Brian Birk
Managing member of sun mountain capital partners, l.l.c.Sally Corning

How XGN stock reacted

Close before

$4.41

Nov 12, 2026

First close after

-6.35%

$4.13

5 trading days

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Since filing

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Frequently asked questions

What did XGN file with the SEC on Nov 13, 2026?

XGN filed a SCHEDULE 13G/A (SEC filing). NMSIC Co-Investment Fund, L.P. and its general partner Sun Mountain Capital Partners, L.L.C. filed an amended Schedule 13G reporting beneficial ownership of 863,958 shares, or 3.39%, of Exagen Inc. common stock. The filing is a passive ownership disclosure with no reported change in holdings.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did XGN stock react to this filing?

XGN closed at $4.41 before the filing and $4.13 on Nov 13, 2026 (-6.35%).

Other XGN SEC filings

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